Hello ! Thanks for your awnser..
I changed my LDO to try and the thing is identical, when I plug the multimeter I have 1.80 then a micro fall to 1.599 then 1.780 and remains stabilized there and I think that is what puts me in fault RI, I imagine that it comes from a resistor yet they are all functional. At least they show a value lower than the others but proportional to 1.72 and not 1.8 I do not understand too much

In the video I test a track next to it which is good and the LDO of the défective Track..

https://www.veed.io/view/f9daf6e0-0e96-4b73-b2cc-006d9390db52?sharingWidget=true&panel=share